Door check



B. E. AND M! E. BOWLES.

DOOR CHECK- APPLICATION FILED JULY H. 1921f 1,408,33 Patented Feb. 28, 1922.

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UNITED STATES" PATENT OFFICE.

BYRON E. BOWLES AND MYRON EDWARD BOWLES, COUNCIL BLUFFS, IOWA.

DOOR CHECK.

Application filed July 11,

To all whom it may concern:

Be it known that BYnoN E. BowLEs and Mrnoiv EDWARD Bownns, citizens of the United States, residing at Council Bluffs, in he county of Pottawattamie and State of Iowa, have invented certain new and useful Improvements in Door Checks, following is a specification.

The invention relates to door checks and has for its object to provide a device of this character comprising a cylinder having slidably mounted therein a piston carried by a piston rod, said piston rod being formed from two sections 'hingedly connected to each other and having its outer section pivotally connected to the door jamb adjacent the hinged edge of the door. The other end of the cylinder being pivotally connected to the free edge of the door and adapted to be forced downwardly on the piston and piston rod during a door checking operation. Also to provide a stop adapted to be engaged by the outer section of the piston rod during a door closing operation, said section being provided with spring means for moving the same out of axial alignment with the other piston rod sections during a door closing operation.

A further object is to provide a coiled spring having one of its ends connected to the free end of the door and its other end connected to the door jamb adjacent the hinging point of the door and formingmeans for assisting in closing the door.

l/Vith the above and other objects in view the invention resides in the combination and arrangement of parts as hereinafter set forth, shown in the drawings, described and claimed, it being understood that changes in the precise embodiment of the invention may be made within the scope of what is claimed without departing from the spirit of the invention. .7

In the drawings V Figure 1 is a perspective view showing the door check applied to a door.

Figure 2 is a horizontal sectional view through the upper end of the door showing the door in the act of closing.

Figure 3 is a detail perspective view of the door carried bracket to which the coiled spring and cylinder are connected.

Figure 1 is an enlarged side elevation of the door checking mechanism and cylinder, showing part thereof in section.

Figure 5 is a perspective view of the door Specification of Letters latent.

of which the r Patented Feb. 28, 1922. 1921. Serial n 483,739.

frame carried member against which the outer piston rod section engages and is held.

Figure 6 is an enlarged detail view of another form of cylinder showing a check valve whereby'air may be rapidly taken into the cylinder when the door is opened.

Referring to the drawings, the numeral 1 designates a conventional form of door frame, to the jamb 2 of which is hingedly connected at 3 a conventional form of door 4. Secured to the free end 5 of the door is a bracket 6, which bracket is provided with a vertically disposed pin 7. Pin 7 has pivoted thereto as at 8 an extension 9 of a door checking cylinder 10, which cylinder is horizontally disposed and has slidably mounted therein a piston 11 carried by a piston rod 12. Piston rod 12 extends through the head 13 of the piston and has pivoted thereto at 14 a piston rod section 15, which section is in turn pivotally mounted at 16'to theupper end of a vertically disposed pin 17 carried by a. bracket 18 secured to the inner face of the jamb Extending around the pin '17 is a coiled spring 19, which spring has one of its ends 20 in engagement with the bracket 18, and its other end provided with a loop 21 which extends around a piston rod section 15. Spring 19 forms means whereby a pull will be exerted at all times on the piston rod section 15 in the direction of the arrow a, thereby maintaining and pulling the piston 11 in the direction of the cylinder head 13 during a door opening operation, and also forming means during a door closing operation for forcing the piston rod section 15 into engagement with the bottom 22 of the bracket 23 which is secured to upper end of the door frame and to the inner face of the upper rail thereof. It will be seen that whenthe door is opened asshown in Figures 1 and 2 that the piston 11 will be moved in the direction of the cylinder head 13, which action will suck air into the cylinder 10 through the needle valve controlling port 2 1, and that when the door is released and forced to a closed position by means of a coiled spring 25, which is connected to the lower end of the pin 17 carried by the bracket 18, and to the lower end of the pin 7 carried by the bracket 6 that the air will be slowly exhausted through the needle valve controlled port 2 1 thereby checking the door. However during the closing operation of the door the piston rod section 15 moves in the direction of the arrow (4 and engages in the bottom 22 of the bracket 23 and is checked in its movement, therefore a further checking is accomplished by the slow exhaust of the air from the cylinder 10.

Referring to Figure v6 wherein the modified form of cylinder is provided, it will be seen that the structure is substantially the same with the exception that the check valve 26 is provided which will allow a greater volume of air to pass into the cylinder 10 on the door opening operation thereby allowing the door to be quickly opened, however the checking of the door is substantially the same, and during the doorcheckingoperation the check valve is closed. The form of cylinder shown in Figure 6 is particularly adapted for use in connection with heavy doors.

The invention having been set forth What is claimed as new and useful is 1. The combination with a door hingedly mounted in a door frame, of a cylinder ivotally connected to the free end of the coor, a piston slidably mounted in said cylinder, a piston rod carried by said piston, said piston rod having hingedly connected thereto a piston rod section, the free end of said piston rod section being hingedly connected to the door j amb adjacent the hinged edge of said door, a stop carried by the door frame and adapted to be engaged by the hinged piston rod section, a spring for norand a coiled spring having one of its ends connected adjacent the free end of the door and its other end connected to the door frame and forming means for forcing said door to a closed position against the checking action of the piston Within the cylinder.

2. The combination with a door hingedly mounted in a door frame, of a cylinder pivot-ally connected to the free end of a door, a piston slidably mounted in said cylinder, a piston rod carried by said piston, said piston rod having hingedly connected thereto a piston rod section, the free end of said piston rod section being hingedly connected to the door jamb adjacent the hinged edge of the door, a stop carried by the door frame and adapted to be engaged by the hinged piston rod section, a spring for normally holding and forcing said hinged piston rod section in the direction of its stop, spring means for normally forcing the door to closed position and valve means for controlling the intaking and exhausting of air from the cylinder.

In testimony whereof We afiix our signa tures.

BYRON E. BOWLES, MYRON EDWARD BoWLEs 

